./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.6_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c0f69a-92d2-414a-81f4-2f8a18908d99/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c0f69a-92d2-414a-81f4-2f8a18908d99/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c0f69a-92d2-414a-81f4-2f8a18908d99/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c0f69a-92d2-414a-81f4-2f8a18908d99/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.6_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c0f69a-92d2-414a-81f4-2f8a18908d99/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c0f69a-92d2-414a-81f4-2f8a18908d99/bin/uautomizer-IVEQpCNsaX --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 565b6ce95556e8da762639f02f67420526bfc83d983a463b45ce69e32f810898 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:50:35,337 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:50:35,339 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:50:35,373 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:50:35,378 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:50:35,379 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:50:35,381 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:50:35,384 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:50:35,388 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:50:35,394 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:50:35,396 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:50:35,399 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:50:35,399 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:50:35,403 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:50:35,405 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:50:35,408 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:50:35,410 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:50:35,412 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:50:35,415 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:50:35,425 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:50:35,427 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:50:35,429 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:50:35,433 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:50:35,434 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:50:35,448 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:50:35,449 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:50:35,449 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:50:35,452 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:50:35,453 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:50:35,454 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:50:35,455 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:50:35,456 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:50:35,459 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:50:35,460 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:50:35,462 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:50:35,462 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:50:35,463 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:50:35,464 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:50:35,464 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:50:35,465 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:50:35,466 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:50:35,467 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c0f69a-92d2-414a-81f4-2f8a18908d99/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 09:50:35,512 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:50:35,513 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:50:35,513 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:50:35,514 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:50:35,519 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:50:35,519 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:50:35,519 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:50:35,520 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:50:35,520 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:50:35,520 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:50:35,521 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:50:35,522 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:50:35,522 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 09:50:35,522 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:50:35,522 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 09:50:35,523 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:50:35,523 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 09:50:35,523 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:50:35,523 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 09:50:35,524 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:50:35,524 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:50:35,524 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:50:35,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:50:35,525 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:50:35,525 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:50:35,525 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 09:50:35,526 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:50:35,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:50:35,526 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 09:50:35,528 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 09:50:35,528 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 09:50:35,528 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:50:35,528 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c0f69a-92d2-414a-81f4-2f8a18908d99/bin/uautomizer-IVEQpCNsaX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c0f69a-92d2-414a-81f4-2f8a18908d99/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 565b6ce95556e8da762639f02f67420526bfc83d983a463b45ce69e32f810898 [2021-11-09 09:50:35,832 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:50:35,862 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:50:35,866 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:50:35,868 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:50:35,868 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:50:35,869 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c0f69a-92d2-414a-81f4-2f8a18908d99/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/combinations/pals_lcr.6_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c [2021-11-09 09:50:35,971 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c0f69a-92d2-414a-81f4-2f8a18908d99/bin/uautomizer-IVEQpCNsaX/data/daa5df3fc/5694e68b29294855b880018c9ac21811/FLAGce76c8b48 [2021-11-09 09:50:36,912 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:50:36,913 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c0f69a-92d2-414a-81f4-2f8a18908d99/sv-benchmarks/c/combinations/pals_lcr.6_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c [2021-11-09 09:50:36,953 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c0f69a-92d2-414a-81f4-2f8a18908d99/bin/uautomizer-IVEQpCNsaX/data/daa5df3fc/5694e68b29294855b880018c9ac21811/FLAGce76c8b48 [2021-11-09 09:50:37,342 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c0f69a-92d2-414a-81f4-2f8a18908d99/bin/uautomizer-IVEQpCNsaX/data/daa5df3fc/5694e68b29294855b880018c9ac21811 [2021-11-09 09:50:37,345 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:50:37,347 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 09:50:37,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:50:37,355 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:50:37,362 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:50:37,362 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:50:37" (1/1) ... [2021-11-09 09:50:37,363 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@400593b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:37, skipping insertion in model container [2021-11-09 09:50:37,364 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:50:37" (1/1) ... [2021-11-09 09:50:37,372 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:50:37,534 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:50:38,075 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c0f69a-92d2-414a-81f4-2f8a18908d99/sv-benchmarks/c/combinations/pals_lcr.6_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c[15688,15701] [2021-11-09 09:50:38,184 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c0f69a-92d2-414a-81f4-2f8a18908d99/sv-benchmarks/c/combinations/pals_lcr.6_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c[22735,22748] [2021-11-09 09:50:39,298 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:50:39,312 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:50:39,383 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c0f69a-92d2-414a-81f4-2f8a18908d99/sv-benchmarks/c/combinations/pals_lcr.6_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c[15688,15701] [2021-11-09 09:50:39,402 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c0f69a-92d2-414a-81f4-2f8a18908d99/sv-benchmarks/c/combinations/pals_lcr.6_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c[22735,22748] [2021-11-09 09:50:40,084 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:50:40,123 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:50:40,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:40 WrapperNode [2021-11-09 09:50:40,124 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:50:40,129 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 09:50:40,129 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 09:50:40,129 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 09:50:40,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:40" (1/1) ... [2021-11-09 09:50:40,224 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:40" (1/1) ... [2021-11-09 09:50:40,680 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 09:50:40,682 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:50:40,682 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:50:40,683 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:50:40,693 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:40" (1/1) ... [2021-11-09 09:50:40,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:40" (1/1) ... [2021-11-09 09:50:40,776 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:40" (1/1) ... [2021-11-09 09:50:40,777 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:40" (1/1) ... [2021-11-09 09:50:41,031 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:40" (1/1) ... [2021-11-09 09:50:41,073 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:40" (1/1) ... [2021-11-09 09:50:41,135 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:40" (1/1) ... [2021-11-09 09:50:41,271 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:50:41,280 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:50:41,280 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:50:41,281 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:50:41,282 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:40" (1/1) ... [2021-11-09 09:50:41,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:50:41,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c0f69a-92d2-414a-81f4-2f8a18908d99/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:50:41,350 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c0f69a-92d2-414a-81f4-2f8a18908d99/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:50:41,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c0f69a-92d2-414a-81f4-2f8a18908d99/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:50:41,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:50:41,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 09:50:41,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:50:41,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:50:46,815 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:50:46,816 INFO L299 CfgBuilder]: Removed 38 assume(true) statements. [2021-11-09 09:50:46,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:50:46 BoogieIcfgContainer [2021-11-09 09:50:46,820 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:50:46,823 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:50:46,823 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:50:46,827 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:50:46,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:50:37" (1/3) ... [2021-11-09 09:50:46,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f958ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:50:46, skipping insertion in model container [2021-11-09 09:50:46,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:40" (2/3) ... [2021-11-09 09:50:46,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f958ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:50:46, skipping insertion in model container [2021-11-09 09:50:46,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:50:46" (3/3) ... [2021-11-09 09:50:46,831 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c [2021-11-09 09:50:46,838 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:50:46,838 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-09 09:50:46,901 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:50:46,909 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-09 09:50:46,909 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-09 09:50:46,952 INFO L276 IsEmpty]: Start isEmpty. Operand has 925 states, 922 states have (on average 1.9002169197396963) internal successors, (1752), 924 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:46,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 09:50:46,963 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:50:46,963 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:50:46,964 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:50:46,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:46,971 INFO L85 PathProgramCache]: Analyzing trace with hash 340623278, now seen corresponding path program 1 times [2021-11-09 09:50:46,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:46,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113182981] [2021-11-09 09:50:46,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:46,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:47,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:47,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:50:47,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:47,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113182981] [2021-11-09 09:50:47,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113182981] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:50:47,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:50:47,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:50:47,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712707970] [2021-11-09 09:50:47,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 09:50:47,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:50:47,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 09:50:47,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:50:47,309 INFO L87 Difference]: Start difference. First operand has 925 states, 922 states have (on average 1.9002169197396963) internal successors, (1752), 924 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:47,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:50:47,421 INFO L93 Difference]: Finished difference Result 1802 states and 3414 transitions. [2021-11-09 09:50:47,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 09:50:47,423 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-09 09:50:47,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:50:47,458 INFO L225 Difference]: With dead ends: 1802 [2021-11-09 09:50:47,458 INFO L226 Difference]: Without dead ends: 859 [2021-11-09 09:50:47,469 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:50:47,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2021-11-09 09:50:47,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 859. [2021-11-09 09:50:47,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 857 states have (on average 1.8891481913652275) internal successors, (1619), 858 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:47,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1619 transitions. [2021-11-09 09:50:47,599 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1619 transitions. Word has length 38 [2021-11-09 09:50:47,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:50:47,600 INFO L470 AbstractCegarLoop]: Abstraction has 859 states and 1619 transitions. [2021-11-09 09:50:47,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:47,601 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1619 transitions. [2021-11-09 09:50:47,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 09:50:47,603 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:50:47,604 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:50:47,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 09:50:47,604 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:50:47,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:47,605 INFO L85 PathProgramCache]: Analyzing trace with hash 615382892, now seen corresponding path program 1 times [2021-11-09 09:50:47,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:47,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709665720] [2021-11-09 09:50:47,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:47,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:47,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:47,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:50:47,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:47,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709665720] [2021-11-09 09:50:47,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709665720] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:50:47,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:50:47,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:50:47,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268885936] [2021-11-09 09:50:47,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:50:47,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:50:47,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:50:47,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:50:47,781 INFO L87 Difference]: Start difference. First operand 859 states and 1619 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:47,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:50:47,940 INFO L93 Difference]: Finished difference Result 922 states and 1717 transitions. [2021-11-09 09:50:47,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:50:47,951 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-09 09:50:47,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:50:47,958 INFO L225 Difference]: With dead ends: 922 [2021-11-09 09:50:47,959 INFO L226 Difference]: Without dead ends: 859 [2021-11-09 09:50:47,960 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:50:47,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2021-11-09 09:50:47,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 859. [2021-11-09 09:50:47,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 857 states have (on average 1.8424737456242708) internal successors, (1579), 858 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:47,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1579 transitions. [2021-11-09 09:50:47,993 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1579 transitions. Word has length 38 [2021-11-09 09:50:47,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:50:47,995 INFO L470 AbstractCegarLoop]: Abstraction has 859 states and 1579 transitions. [2021-11-09 09:50:47,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:47,995 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1579 transitions. [2021-11-09 09:50:48,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-09 09:50:48,006 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:50:48,007 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:50:48,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 09:50:48,007 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:50:48,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:48,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1649684925, now seen corresponding path program 1 times [2021-11-09 09:50:48,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:48,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871621007] [2021-11-09 09:50:48,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:48,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:48,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:48,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:50:48,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:48,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871621007] [2021-11-09 09:50:48,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871621007] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:50:48,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:50:48,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:50:48,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288966950] [2021-11-09 09:50:48,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:50:48,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:50:48,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:50:48,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:50:48,308 INFO L87 Difference]: Start difference. First operand 859 states and 1579 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:57,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:50:57,268 INFO L93 Difference]: Finished difference Result 3114 states and 5888 transitions. [2021-11-09 09:50:57,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:50:57,269 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-09 09:50:57,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:50:57,292 INFO L225 Difference]: With dead ends: 3114 [2021-11-09 09:50:57,292 INFO L226 Difference]: Without dead ends: 2361 [2021-11-09 09:50:57,294 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:50:57,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2021-11-09 09:50:57,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 2361. [2021-11-09 09:50:57,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2361 states, 2359 states have (on average 1.5654938533276812) internal successors, (3693), 2360 states have internal predecessors, (3693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:57,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2361 states to 2361 states and 3693 transitions. [2021-11-09 09:50:57,370 INFO L78 Accepts]: Start accepts. Automaton has 2361 states and 3693 transitions. Word has length 63 [2021-11-09 09:50:57,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:50:57,370 INFO L470 AbstractCegarLoop]: Abstraction has 2361 states and 3693 transitions. [2021-11-09 09:50:57,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:57,371 INFO L276 IsEmpty]: Start isEmpty. Operand 2361 states and 3693 transitions. [2021-11-09 09:50:57,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-09 09:50:57,373 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:50:57,373 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:50:57,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 09:50:57,374 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:50:57,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:57,375 INFO L85 PathProgramCache]: Analyzing trace with hash -2101054792, now seen corresponding path program 1 times [2021-11-09 09:50:57,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:57,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790825137] [2021-11-09 09:50:57,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:57,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:57,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:57,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:50:57,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:57,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790825137] [2021-11-09 09:50:57,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790825137] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:50:57,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:50:57,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:50:57,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669623561] [2021-11-09 09:50:57,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:50:57,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:50:57,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:50:57,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:50:57,499 INFO L87 Difference]: Start difference. First operand 2361 states and 3693 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:57,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:50:57,553 INFO L93 Difference]: Finished difference Result 2473 states and 3871 transitions. [2021-11-09 09:50:57,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:50:57,553 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-09 09:50:57,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:50:57,571 INFO L225 Difference]: With dead ends: 2473 [2021-11-09 09:50:57,572 INFO L226 Difference]: Without dead ends: 2414 [2021-11-09 09:50:57,573 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:50:57,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2021-11-09 09:50:57,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 2412. [2021-11-09 09:50:57,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2412 states, 2410 states have (on average 1.566390041493776) internal successors, (3775), 2411 states have internal predecessors, (3775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:57,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 3775 transitions. [2021-11-09 09:50:57,650 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 3775 transitions. Word has length 77 [2021-11-09 09:50:57,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:50:57,651 INFO L470 AbstractCegarLoop]: Abstraction has 2412 states and 3775 transitions. [2021-11-09 09:50:57,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:57,652 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 3775 transitions. [2021-11-09 09:50:57,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-09 09:50:57,653 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:50:57,653 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:50:57,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 09:50:57,654 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:50:57,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:57,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1452480302, now seen corresponding path program 1 times [2021-11-09 09:50:57,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:57,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004206092] [2021-11-09 09:50:57,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:57,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:57,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:57,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:50:57,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:57,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004206092] [2021-11-09 09:50:57,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004206092] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:50:57,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:50:57,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:50:57,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134317181] [2021-11-09 09:50:57,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:50:57,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:50:57,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:50:57,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:50:57,758 INFO L87 Difference]: Start difference. First operand 2412 states and 3775 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:57,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:50:57,825 INFO L93 Difference]: Finished difference Result 2620 states and 4107 transitions. [2021-11-09 09:50:57,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:50:57,826 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-09 09:50:57,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:50:57,847 INFO L225 Difference]: With dead ends: 2620 [2021-11-09 09:50:57,847 INFO L226 Difference]: Without dead ends: 2510 [2021-11-09 09:50:57,849 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:50:57,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2510 states. [2021-11-09 09:50:57,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2510 to 2508. [2021-11-09 09:50:57,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2508 states, 2506 states have (on average 1.567438148443735) internal successors, (3928), 2507 states have internal predecessors, (3928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:57,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2508 states to 2508 states and 3928 transitions. [2021-11-09 09:50:57,949 INFO L78 Accepts]: Start accepts. Automaton has 2508 states and 3928 transitions. Word has length 77 [2021-11-09 09:50:57,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:50:57,954 INFO L470 AbstractCegarLoop]: Abstraction has 2508 states and 3928 transitions. [2021-11-09 09:50:57,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:57,954 INFO L276 IsEmpty]: Start isEmpty. Operand 2508 states and 3928 transitions. [2021-11-09 09:50:57,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-09 09:50:57,957 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:50:57,958 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:50:57,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 09:50:57,958 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:50:57,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:57,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1624501596, now seen corresponding path program 1 times [2021-11-09 09:50:57,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:57,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674003238] [2021-11-09 09:50:57,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:57,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:57,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:58,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:50:58,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:58,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674003238] [2021-11-09 09:50:58,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674003238] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:50:58,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:50:58,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-09 09:50:58,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186630060] [2021-11-09 09:50:58,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 09:50:58,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:50:58,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 09:50:58,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:50:58,148 INFO L87 Difference]: Start difference. First operand 2508 states and 3928 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:58,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:50:58,587 INFO L93 Difference]: Finished difference Result 4980 states and 7876 transitions. [2021-11-09 09:50:58,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 09:50:58,596 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-09 09:50:58,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:50:58,637 INFO L225 Difference]: With dead ends: 4980 [2021-11-09 09:50:58,637 INFO L226 Difference]: Without dead ends: 4774 [2021-11-09 09:50:58,644 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:50:58,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4774 states. [2021-11-09 09:50:58,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4774 to 2712. [2021-11-09 09:50:58,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2712 states, 2710 states have (on average 1.5675276752767529) internal successors, (4248), 2711 states have internal predecessors, (4248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:58,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2712 states to 2712 states and 4248 transitions. [2021-11-09 09:50:58,795 INFO L78 Accepts]: Start accepts. Automaton has 2712 states and 4248 transitions. Word has length 77 [2021-11-09 09:50:58,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:50:58,795 INFO L470 AbstractCegarLoop]: Abstraction has 2712 states and 4248 transitions. [2021-11-09 09:50:58,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:58,796 INFO L276 IsEmpty]: Start isEmpty. Operand 2712 states and 4248 transitions. [2021-11-09 09:50:58,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-09 09:50:58,797 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:50:58,798 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:50:58,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 09:50:58,798 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:50:58,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:58,799 INFO L85 PathProgramCache]: Analyzing trace with hash 806369108, now seen corresponding path program 1 times [2021-11-09 09:50:58,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:58,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708299309] [2021-11-09 09:50:58,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:58,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:58,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:58,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:50:58,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:58,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708299309] [2021-11-09 09:50:58,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708299309] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:50:58,892 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:50:58,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:50:58,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667083607] [2021-11-09 09:50:58,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:50:58,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:50:58,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:50:58,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:50:58,895 INFO L87 Difference]: Start difference. First operand 2712 states and 4248 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:58,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:50:58,988 INFO L93 Difference]: Finished difference Result 3320 states and 5208 transitions. [2021-11-09 09:50:58,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:50:58,989 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-09 09:50:58,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:50:59,013 INFO L225 Difference]: With dead ends: 3320 [2021-11-09 09:50:59,014 INFO L226 Difference]: Without dead ends: 2910 [2021-11-09 09:50:59,016 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:50:59,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2910 states. [2021-11-09 09:50:59,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2910 to 2908. [2021-11-09 09:50:59,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2908 states, 2906 states have (on average 1.5664143152099106) internal successors, (4552), 2907 states have internal predecessors, (4552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:59,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2908 states to 2908 states and 4552 transitions. [2021-11-09 09:50:59,220 INFO L78 Accepts]: Start accepts. Automaton has 2908 states and 4552 transitions. Word has length 79 [2021-11-09 09:50:59,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:50:59,221 INFO L470 AbstractCegarLoop]: Abstraction has 2908 states and 4552 transitions. [2021-11-09 09:50:59,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:59,221 INFO L276 IsEmpty]: Start isEmpty. Operand 2908 states and 4552 transitions. [2021-11-09 09:50:59,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-09 09:50:59,222 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:50:59,223 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:50:59,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 09:50:59,223 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:50:59,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:59,224 INFO L85 PathProgramCache]: Analyzing trace with hash 872862620, now seen corresponding path program 1 times [2021-11-09 09:50:59,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:59,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650021895] [2021-11-09 09:50:59,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:59,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:59,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:59,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:50:59,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:59,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650021895] [2021-11-09 09:50:59,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650021895] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:50:59,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:50:59,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-09 09:50:59,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568227019] [2021-11-09 09:50:59,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 09:50:59,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:50:59,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 09:50:59,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:50:59,521 INFO L87 Difference]: Start difference. First operand 2908 states and 4552 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:59,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:50:59,915 INFO L93 Difference]: Finished difference Result 3514 states and 5504 transitions. [2021-11-09 09:50:59,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:50:59,916 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-09 09:50:59,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:50:59,937 INFO L225 Difference]: With dead ends: 3514 [2021-11-09 09:50:59,937 INFO L226 Difference]: Without dead ends: 2910 [2021-11-09 09:50:59,939 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-11-09 09:50:59,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2910 states. [2021-11-09 09:51:00,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2910 to 2908. [2021-11-09 09:51:00,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2908 states, 2906 states have (on average 1.5643496214728148) internal successors, (4546), 2907 states have internal predecessors, (4546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:00,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2908 states to 2908 states and 4546 transitions. [2021-11-09 09:51:00,066 INFO L78 Accepts]: Start accepts. Automaton has 2908 states and 4546 transitions. Word has length 79 [2021-11-09 09:51:00,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:00,066 INFO L470 AbstractCegarLoop]: Abstraction has 2908 states and 4546 transitions. [2021-11-09 09:51:00,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:00,067 INFO L276 IsEmpty]: Start isEmpty. Operand 2908 states and 4546 transitions. [2021-11-09 09:51:00,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-09 09:51:00,068 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:00,068 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:00,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 09:51:00,069 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:00,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:00,070 INFO L85 PathProgramCache]: Analyzing trace with hash -385682984, now seen corresponding path program 1 times [2021-11-09 09:51:00,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:00,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308083918] [2021-11-09 09:51:00,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:00,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:00,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:00,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:51:00,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:00,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308083918] [2021-11-09 09:51:00,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308083918] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:51:00,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:51:00,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:51:00,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948475334] [2021-11-09 09:51:00,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:51:00,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:00,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:51:00,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:51:00,153 INFO L87 Difference]: Start difference. First operand 2908 states and 4546 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:00,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:00,291 INFO L93 Difference]: Finished difference Result 4044 states and 6316 transitions. [2021-11-09 09:51:00,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:51:00,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-09 09:51:00,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:00,330 INFO L225 Difference]: With dead ends: 4044 [2021-11-09 09:51:00,331 INFO L226 Difference]: Without dead ends: 3440 [2021-11-09 09:51:00,333 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:51:00,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3440 states. [2021-11-09 09:51:00,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3440 to 3438. [2021-11-09 09:51:00,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3438 states, 3436 states have (on average 1.559371362048894) internal successors, (5358), 3437 states have internal predecessors, (5358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:00,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3438 states to 3438 states and 5358 transitions. [2021-11-09 09:51:00,491 INFO L78 Accepts]: Start accepts. Automaton has 3438 states and 5358 transitions. Word has length 79 [2021-11-09 09:51:00,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:00,492 INFO L470 AbstractCegarLoop]: Abstraction has 3438 states and 5358 transitions. [2021-11-09 09:51:00,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:00,493 INFO L276 IsEmpty]: Start isEmpty. Operand 3438 states and 5358 transitions. [2021-11-09 09:51:00,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-09 09:51:00,494 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:00,494 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:00,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-09 09:51:00,496 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:00,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:00,497 INFO L85 PathProgramCache]: Analyzing trace with hash -111995272, now seen corresponding path program 1 times [2021-11-09 09:51:00,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:00,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494265602] [2021-11-09 09:51:00,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:00,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:00,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:00,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:51:00,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:00,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494265602] [2021-11-09 09:51:00,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494265602] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:51:00,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:51:00,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:51:00,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725793603] [2021-11-09 09:51:00,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:51:00,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:00,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:51:00,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:51:00,570 INFO L87 Difference]: Start difference. First operand 3438 states and 5358 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:00,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:00,772 INFO L93 Difference]: Finished difference Result 5562 states and 8632 transitions. [2021-11-09 09:51:00,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:51:00,773 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-09 09:51:00,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:00,798 INFO L225 Difference]: With dead ends: 5562 [2021-11-09 09:51:00,799 INFO L226 Difference]: Without dead ends: 4428 [2021-11-09 09:51:00,802 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:51:00,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4428 states. [2021-11-09 09:51:01,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4428 to 4426. [2021-11-09 09:51:01,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4426 states, 4424 states have (on average 1.548372513562387) internal successors, (6850), 4425 states have internal predecessors, (6850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:01,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4426 states to 4426 states and 6850 transitions. [2021-11-09 09:51:01,069 INFO L78 Accepts]: Start accepts. Automaton has 4426 states and 6850 transitions. Word has length 79 [2021-11-09 09:51:01,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:01,069 INFO L470 AbstractCegarLoop]: Abstraction has 4426 states and 6850 transitions. [2021-11-09 09:51:01,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:01,071 INFO L276 IsEmpty]: Start isEmpty. Operand 4426 states and 6850 transitions. [2021-11-09 09:51:01,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-09 09:51:01,072 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:01,072 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:01,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-09 09:51:01,073 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:01,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:01,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1707076376, now seen corresponding path program 1 times [2021-11-09 09:51:01,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:01,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430245754] [2021-11-09 09:51:01,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:01,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:01,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:01,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:51:01,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:01,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430245754] [2021-11-09 09:51:01,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430245754] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:51:01,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:51:01,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:51:01,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537881324] [2021-11-09 09:51:01,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:51:01,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:01,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:51:01,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:51:01,152 INFO L87 Difference]: Start difference. First operand 4426 states and 6850 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:01,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:01,573 INFO L93 Difference]: Finished difference Result 8382 states and 12868 transitions. [2021-11-09 09:51:01,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:51:01,574 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-09 09:51:01,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:01,592 INFO L225 Difference]: With dead ends: 8382 [2021-11-09 09:51:01,593 INFO L226 Difference]: Without dead ends: 6260 [2021-11-09 09:51:01,598 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:51:01,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6260 states. [2021-11-09 09:51:02,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6260 to 6258. [2021-11-09 09:51:02,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6258 states, 6256 states have (on average 1.5297314578005115) internal successors, (9570), 6257 states have internal predecessors, (9570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:02,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6258 states to 6258 states and 9570 transitions. [2021-11-09 09:51:02,088 INFO L78 Accepts]: Start accepts. Automaton has 6258 states and 9570 transitions. Word has length 79 [2021-11-09 09:51:02,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:02,089 INFO L470 AbstractCegarLoop]: Abstraction has 6258 states and 9570 transitions. [2021-11-09 09:51:02,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:02,089 INFO L276 IsEmpty]: Start isEmpty. Operand 6258 states and 9570 transitions. [2021-11-09 09:51:02,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-09 09:51:02,090 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:02,091 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:02,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-09 09:51:02,092 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:02,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:02,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1886482360, now seen corresponding path program 1 times [2021-11-09 09:51:02,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:02,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492145615] [2021-11-09 09:51:02,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:02,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:02,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:02,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:51:02,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:02,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492145615] [2021-11-09 09:51:02,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492145615] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:51:02,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:51:02,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:51:02,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137406113] [2021-11-09 09:51:02,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:51:02,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:02,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:51:02,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:51:02,171 INFO L87 Difference]: Start difference. First operand 6258 states and 9570 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:02,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:02,792 INFO L93 Difference]: Finished difference Result 13590 states and 20548 transitions. [2021-11-09 09:51:02,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:51:02,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-09 09:51:02,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:02,819 INFO L225 Difference]: With dead ends: 13590 [2021-11-09 09:51:02,819 INFO L226 Difference]: Without dead ends: 9636 [2021-11-09 09:51:02,829 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:51:02,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9636 states. [2021-11-09 09:51:03,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9636 to 9634. [2021-11-09 09:51:03,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9634 states, 9632 states have (on average 1.503529900332226) internal successors, (14482), 9633 states have internal predecessors, (14482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:03,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9634 states to 9634 states and 14482 transitions. [2021-11-09 09:51:03,695 INFO L78 Accepts]: Start accepts. Automaton has 9634 states and 14482 transitions. Word has length 79 [2021-11-09 09:51:03,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:03,696 INFO L470 AbstractCegarLoop]: Abstraction has 9634 states and 14482 transitions. [2021-11-09 09:51:03,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:03,697 INFO L276 IsEmpty]: Start isEmpty. Operand 9634 states and 14482 transitions. [2021-11-09 09:51:03,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 09:51:03,701 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:03,702 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:03,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-09 09:51:03,703 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:03,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:03,704 INFO L85 PathProgramCache]: Analyzing trace with hash 874214487, now seen corresponding path program 1 times [2021-11-09 09:51:03,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:03,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261288057] [2021-11-09 09:51:03,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:03,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:03,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:03,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:51:03,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:03,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261288057] [2021-11-09 09:51:03,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261288057] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:51:03,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:51:03,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-09 09:51:03,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170705889] [2021-11-09 09:51:03,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 09:51:03,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:03,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 09:51:03,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:51:03,873 INFO L87 Difference]: Start difference. First operand 9634 states and 14482 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:05,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:05,195 INFO L93 Difference]: Finished difference Result 15969 states and 23625 transitions. [2021-11-09 09:51:05,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 09:51:05,196 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-09 09:51:05,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:05,238 INFO L225 Difference]: With dead ends: 15969 [2021-11-09 09:51:05,238 INFO L226 Difference]: Without dead ends: 15967 [2021-11-09 09:51:05,242 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:51:05,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15967 states. [2021-11-09 09:51:06,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15967 to 10018. [2021-11-09 09:51:06,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10018 states, 10016 states have (on average 1.4810303514376997) internal successors, (14834), 10017 states have internal predecessors, (14834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:06,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10018 states to 10018 states and 14834 transitions. [2021-11-09 09:51:06,127 INFO L78 Accepts]: Start accepts. Automaton has 10018 states and 14834 transitions. Word has length 80 [2021-11-09 09:51:06,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:06,127 INFO L470 AbstractCegarLoop]: Abstraction has 10018 states and 14834 transitions. [2021-11-09 09:51:06,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:06,128 INFO L276 IsEmpty]: Start isEmpty. Operand 10018 states and 14834 transitions. [2021-11-09 09:51:06,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-09 09:51:06,136 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:06,137 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:06,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-09 09:51:06,138 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:06,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:06,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1535674975, now seen corresponding path program 1 times [2021-11-09 09:51:06,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:06,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673386873] [2021-11-09 09:51:06,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:06,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:06,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:06,299 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-09 09:51:06,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:06,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673386873] [2021-11-09 09:51:06,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673386873] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:51:06,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:51:06,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-09 09:51:06,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981449741] [2021-11-09 09:51:06,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 09:51:06,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:06,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 09:51:06,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:51:06,303 INFO L87 Difference]: Start difference. First operand 10018 states and 14834 transitions. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:09,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:09,838 INFO L93 Difference]: Finished difference Result 57840 states and 84361 transitions. [2021-11-09 09:51:09,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:51:09,839 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-09 09:51:09,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:09,996 INFO L225 Difference]: With dead ends: 57840 [2021-11-09 09:51:09,996 INFO L226 Difference]: Without dead ends: 50126 [2021-11-09 09:51:10,020 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:51:10,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50126 states. [2021-11-09 09:51:11,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50126 to 17730. [2021-11-09 09:51:11,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17730 states, 17728 states have (on average 1.4649142599277978) internal successors, (25970), 17729 states have internal predecessors, (25970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:11,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17730 states to 17730 states and 25970 transitions. [2021-11-09 09:51:11,888 INFO L78 Accepts]: Start accepts. Automaton has 17730 states and 25970 transitions. Word has length 111 [2021-11-09 09:51:11,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:11,889 INFO L470 AbstractCegarLoop]: Abstraction has 17730 states and 25970 transitions. [2021-11-09 09:51:11,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:11,889 INFO L276 IsEmpty]: Start isEmpty. Operand 17730 states and 25970 transitions. [2021-11-09 09:51:11,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-09 09:51:11,898 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:11,898 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:11,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-09 09:51:11,899 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:11,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:11,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1506152757, now seen corresponding path program 1 times [2021-11-09 09:51:11,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:11,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208205569] [2021-11-09 09:51:11,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:11,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:11,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:12,045 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 09:51:12,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:12,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208205569] [2021-11-09 09:51:12,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208205569] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:51:12,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:51:12,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-09 09:51:12,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455942989] [2021-11-09 09:51:12,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 09:51:12,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:12,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 09:51:12,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:51:12,049 INFO L87 Difference]: Start difference. First operand 17730 states and 25970 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:15,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:15,956 INFO L93 Difference]: Finished difference Result 65552 states and 95497 transitions. [2021-11-09 09:51:15,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:51:15,967 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-09 09:51:15,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:16,133 INFO L225 Difference]: With dead ends: 65552 [2021-11-09 09:51:16,133 INFO L226 Difference]: Without dead ends: 57838 [2021-11-09 09:51:16,159 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:51:16,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57838 states. [2021-11-09 09:51:18,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57838 to 29314. [2021-11-09 09:51:18,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29314 states, 29312 states have (on average 1.453125) internal successors, (42594), 29313 states have internal predecessors, (42594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:18,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29314 states to 29314 states and 42594 transitions. [2021-11-09 09:51:18,661 INFO L78 Accepts]: Start accepts. Automaton has 29314 states and 42594 transitions. Word has length 111 [2021-11-09 09:51:18,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:18,662 INFO L470 AbstractCegarLoop]: Abstraction has 29314 states and 42594 transitions. [2021-11-09 09:51:18,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:18,662 INFO L276 IsEmpty]: Start isEmpty. Operand 29314 states and 42594 transitions. [2021-11-09 09:51:18,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-09 09:51:18,675 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:18,676 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:18,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-09 09:51:18,676 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:18,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:18,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1232465045, now seen corresponding path program 1 times [2021-11-09 09:51:18,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:18,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722450028] [2021-11-09 09:51:18,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:18,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:18,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:18,830 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 09:51:18,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:18,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722450028] [2021-11-09 09:51:18,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722450028] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:51:18,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:51:18,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-09 09:51:18,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779795688] [2021-11-09 09:51:18,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 09:51:18,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:18,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 09:51:18,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:51:18,836 INFO L87 Difference]: Start difference. First operand 29314 states and 42594 transitions. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:23,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:23,083 INFO L93 Difference]: Finished difference Result 73264 states and 106633 transitions. [2021-11-09 09:51:23,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:51:23,084 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-09 09:51:23,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:23,230 INFO L225 Difference]: With dead ends: 73264 [2021-11-09 09:51:23,231 INFO L226 Difference]: Without dead ends: 65550 [2021-11-09 09:51:23,258 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:51:23,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65550 states. [2021-11-09 09:51:26,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65550 to 37026. [2021-11-09 09:51:26,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37026 states, 37024 states have (on average 1.4512208297320657) internal successors, (53730), 37025 states have internal predecessors, (53730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:26,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37026 states to 37026 states and 53730 transitions. [2021-11-09 09:51:26,732 INFO L78 Accepts]: Start accepts. Automaton has 37026 states and 53730 transitions. Word has length 111 [2021-11-09 09:51:26,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:26,733 INFO L470 AbstractCegarLoop]: Abstraction has 37026 states and 53730 transitions. [2021-11-09 09:51:26,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:26,733 INFO L276 IsEmpty]: Start isEmpty. Operand 37026 states and 53730 transitions. [2021-11-09 09:51:26,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-09 09:51:26,747 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:26,748 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:26,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-09 09:51:26,748 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:26,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:26,749 INFO L85 PathProgramCache]: Analyzing trace with hash 586606603, now seen corresponding path program 1 times [2021-11-09 09:51:26,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:26,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056577898] [2021-11-09 09:51:26,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:26,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:26,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:26,881 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-09 09:51:26,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:26,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056577898] [2021-11-09 09:51:26,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056577898] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:51:26,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:51:26,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-09 09:51:26,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600688999] [2021-11-09 09:51:26,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 09:51:26,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:26,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 09:51:26,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:51:26,884 INFO L87 Difference]: Start difference. First operand 37026 states and 53730 transitions. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:32,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:32,622 INFO L93 Difference]: Finished difference Result 80976 states and 117769 transitions. [2021-11-09 09:51:32,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:51:32,622 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-09 09:51:32,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:32,740 INFO L225 Difference]: With dead ends: 80976 [2021-11-09 09:51:32,741 INFO L226 Difference]: Without dead ends: 73262 [2021-11-09 09:51:32,765 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:51:32,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73262 states. [2021-11-09 09:51:36,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73262 to 44738. [2021-11-09 09:51:36,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44738 states, 44736 states have (on average 1.4499731759656653) internal successors, (64866), 44737 states have internal predecessors, (64866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:36,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44738 states to 44738 states and 64866 transitions. [2021-11-09 09:51:36,848 INFO L78 Accepts]: Start accepts. Automaton has 44738 states and 64866 transitions. Word has length 111 [2021-11-09 09:51:36,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:36,848 INFO L470 AbstractCegarLoop]: Abstraction has 44738 states and 64866 transitions. [2021-11-09 09:51:36,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:36,849 INFO L276 IsEmpty]: Start isEmpty. Operand 44738 states and 64866 transitions. [2021-11-09 09:51:36,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-09 09:51:36,865 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:36,865 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:36,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-09 09:51:36,866 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:36,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:36,866 INFO L85 PathProgramCache]: Analyzing trace with hash 766012587, now seen corresponding path program 1 times [2021-11-09 09:51:36,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:36,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622355028] [2021-11-09 09:51:36,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:36,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:36,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:37,003 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 09:51:37,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:37,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622355028] [2021-11-09 09:51:37,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622355028] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:51:37,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:51:37,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-09 09:51:37,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214203019] [2021-11-09 09:51:37,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 09:51:37,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:37,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 09:51:37,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:51:37,006 INFO L87 Difference]: Start difference. First operand 44738 states and 64866 transitions. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:44,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:44,013 INFO L93 Difference]: Finished difference Result 88688 states and 128905 transitions. [2021-11-09 09:51:44,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:51:44,014 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-09 09:51:44,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:44,128 INFO L225 Difference]: With dead ends: 88688 [2021-11-09 09:51:44,128 INFO L226 Difference]: Without dead ends: 80974 [2021-11-09 09:51:44,157 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:51:44,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80974 states. [2021-11-09 09:51:49,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80974 to 52450. [2021-11-09 09:51:49,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52450 states, 52448 states have (on average 1.4490924344112264) internal successors, (76002), 52449 states have internal predecessors, (76002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:49,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52450 states to 52450 states and 76002 transitions. [2021-11-09 09:51:49,365 INFO L78 Accepts]: Start accepts. Automaton has 52450 states and 76002 transitions. Word has length 111 [2021-11-09 09:51:49,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:49,365 INFO L470 AbstractCegarLoop]: Abstraction has 52450 states and 76002 transitions. [2021-11-09 09:51:49,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:49,366 INFO L276 IsEmpty]: Start isEmpty. Operand 52450 states and 76002 transitions. [2021-11-09 09:51:49,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-09 09:51:49,384 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:49,385 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:49,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-09 09:51:49,385 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:49,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:49,386 INFO L85 PathProgramCache]: Analyzing trace with hash -545390527, now seen corresponding path program 1 times [2021-11-09 09:51:49,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:49,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078962561] [2021-11-09 09:51:49,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:49,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:49,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:49,560 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:51:49,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:49,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078962561] [2021-11-09 09:51:49,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078962561] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:51:49,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:51:49,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-09 09:51:49,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726033694] [2021-11-09 09:51:49,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 09:51:49,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:49,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 09:51:49,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:51:49,563 INFO L87 Difference]: Start difference. First operand 52450 states and 76002 transitions. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:57,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:57,316 INFO L93 Difference]: Finished difference Result 91728 states and 133321 transitions. [2021-11-09 09:51:57,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:51:57,317 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-09 09:51:57,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:57,431 INFO L225 Difference]: With dead ends: 91728 [2021-11-09 09:51:57,431 INFO L226 Difference]: Without dead ends: 86350 [2021-11-09 09:51:57,448 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:51:57,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86350 states.